Generic statistical multiplexer with a parametrized bitrate allocation criteria

Abstract The current type synthesis of the redundant actuated parallel mechanisms is adding active-actuated kinematic branches on the basis of the traditional parallel mechanisms, or using screw theory to perform multiple getting intersection and union to complete type synthesis. The number of redundant parallel mechanisms obtained by these two methods is limited. In this paper, based on Grassmann line geometry and Atlas method, a novel and effective method for type synthesis of redundant actuated parallel mechanisms (PMs) with closed-loop units is proposed. Firstly, the degree of freedom (DOF) and constraint line graph of the moving platform are determined successively, and redundant lines are added in constraint line graph to obtain the redundant constraint line graph and their equivalent line graph, and a branch constraint allocation scheme is formulated based on the allocation criteria. Secondly, a scheme is selected and redundant lines are added in the branch chains DOF graph to construct the redundant actuated branch chains with closed-loop units. Finally, the branch chains that meet the requirements of branch chains configuration criteria and F&C (degree of freedom & constraint) line graph are assembled. In this paper, two types of 2 rotational and 1 translational (2R1T) redundant actuated parallel mechanisms and one type of 2 translational and 1 rotational (2T1R) redundant actuated parallel mechanisms with few branches and closed-loop units were taken as examples, and 238, 92 and 15 new configurations were synthesized. All the mechanisms contain closed-loop units, and the mechanisms and the actuators both have good symmetry. Therefore, all the mechanisms have excellent comprehensive performance, in which the two rotational DOFs of the moving platform of 2R1T redundant actuated parallel mechanism can be independently controlled. The instantaneous analysis shows that all mechanisms are not instantaneous, which proves the feasibility and practicability of the method.

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Diffusion process approximations of a statistical multiplexer with Markov modulated bursty traffic sources

1994 IEEE GLOBECOM. Communications: The Global Bridge ◽

10.1109/glocom.1994.512828 ◽

2002 ◽

Cited By ~ 1

Author(s):

Qiang Ren ◽

H. Kobayashi

Keyword(s):

Diffusion Process ◽

Bursty Traffic ◽

Statistical Multiplexer ◽

Markov Modulated

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Diminished autonomy and justice in liver transplantation – The price of scarcity?

Clinical Ethics ◽

10.1177/14777509211016286 ◽

2021 ◽

pp. 147775092110162

Author(s):

Philip Berry ◽

Sreelakshmi Kotha

Keyword(s):

Patient Autonomy ◽

Patient Involvement ◽

Organ Allocation ◽

Self Determination ◽

Wait List ◽

Medical Assessment ◽

Patient Factors ◽

Future Directions ◽

Allocation Criteria ◽

Qualitative Nature

Patient autonomy and distributive justice are fundamental ethical principles that may be at risk in liver transplant units where decisions are dictated by the need to maximise the utility of scarce donor organs. The processes of patient selection, organ allocation and prioritisation on the wait list have evolved in a constrained environment, leading to high levels of complexity and low transparency. Regarding paternalism, opaque listing and allocation criteria, patient factors such as passivity, guilt, chronic illness and sub-clinical encephalopathy are cited as factors that may inhibit patient engagement. Regarding justice, established regional, gender and race based inequities are described. The paradox whereby hepatologists both advocate for individual patients and discharge their duty of stewardship to apportion organs according to larger utilitarian principles is explored. Competing subjective factors such as physicians’ perception of moral responsibility, the qualitative nature of expert medical assessment and institutional or personal loyalty to re-transplantation candidates are described. Realistic limits of self-determination and justice are discussed, and possible future directions in terms of patient involvement proposed.

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Dynamic Bandwidth Allocation Criteria Over Satellite Networks

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference ◽

10.1109/glocom.2007.950 ◽

2007 ◽

Author(s):

Igor Bisio ◽

Mario Marchese

Keyword(s):

Bandwidth Allocation ◽

Satellite Networks ◽

Dynamic Bandwidth Allocation ◽

Allocation Criteria ◽

Dynamic Bandwidth

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Performance analysis of a statistical multiplexer with control on input and/or service processes

Performance Evaluation ◽

10.1016/0166-5316(92)90018-c ◽

1992 ◽

Vol 14 (1) ◽

pp. 21-41 ◽

Cited By ~ 16

Author(s):

Hiroshi Yamada ◽

Fumiaki Machihara

Keyword(s):

Performance Analysis ◽

Statistical Multiplexer

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Abstract 13468: Effect of Listing Criteria on Transplant Rate and Early Outcomes in Adults With Congenital Heart Disease

Circulation ◽

10.1161/circ.142.suppl_3.13468 ◽

2020 ◽

Vol 142 (Suppl_3) ◽

Author(s):

Wagih m Zayed ◽

Neha Bansal ◽

Snehal R Patel ◽

Jacqueline M Lamour ◽

Daniel J GOLDSTEIN ◽

...

Keyword(s):

Congenital Heart Disease ◽

Heart Disease ◽

Congenital Heart ◽

Primary Diagnosis ◽

Organ Allocation ◽

Transplant Recipients ◽

Allocation Policy ◽

Kaplan Meier ◽

Allocation Criteria ◽

History Of

Introduction: Heart failure (HF) is the leading cause of death in adults with congenital heart disease (ACHD). Heart transplant (HT) is one of the few options for the treatment of advanced HF in this growing population. In October 2018, the United Network for Organ Sharing (UNOS) implemented a change in organ allocation criteria. The effect of this change on outcomes in ACHD patients (pts) after listing and transplant has not been evaluated. Hypothesis: Change in organ allocation criteria negatively impacts outcomes in ACHD patients. Methods: Data from the Scientific Registry of Transplant Recipients in pts age > 18 years old listed for HT between Oct. 2016 and 0ct. 2019 and followed through March 2020 were analyzed. Pts were grouped by diagnosis (ACHD and non-ACHD) and by the time of listing (pre- and post-change in allocation criteria). Differences in comorbidities, outcomes while listed, and 1-year Kaplan Meier survival post-HT were compared among groups. For comparison, post-change criteria (status 1-6) were equated to pre-change criteria (status 1A, 1B, 2). Results: Over 3 years, 11,931 patients were listed for HT; 459 had a primary diagnosis of ACHD. ACHD was present in 279/7942 pts listed in the 2 years pre-change and 180/3989 pts in the year post-change. ACHD pts listed post-change were less likely to have a history of cardiac surgery (88% vs. 79%, p=0.01) and more likely to have an abnormal BMI (p=0.015) than ACHD pts pre-change. Post-change, ACHD pts were listed at a higher priority status compared to pre-change ACHD. (Figure). The proportion of pts transplanted with ACHD increased slightly pre- and post-change (3.7% vs. 4.1%). There was no difference in 1-year survival in ACHD pts transplanted pre- and post-change (Figure). Conclusions: Recent changes to the UNOS organ allocation policy increased the proportion of ACHD patients transplanted with no change in early post-HT survival.

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Rethinking the allocation criteria of the labour law rights and protections: A risk-based approach

European Labour Law Journal ◽

10.1177/2031952520905152 ◽

2020 ◽

Vol 11 (2) ◽

pp. 131-141

Author(s):

Federico Fusco

Keyword(s):

Service Providers ◽

Legal Framework ◽

Production Model ◽

Labour Law ◽

Digital Platforms ◽

Economic Framework ◽

Gig Economy ◽

Allocation Criteria ◽

Market Transaction ◽

The Way

The present paper investigates the ongoing validity of the notion of subordination as selection criteria to allocate the labour protections in the contemporary economic framework. The gig economy is deeply affecting the way of working, transforming the employee in a service provider. This phenomenon is partially due to the progressive shift from a firm-based production model towards a market transaction based one. Although its lawfulness is still unclear, it highlights that the way of working is changing in a way that struggles to fit into the classic legal categories. This is mainly due to the fact that the labour protections are usually bestowed moving from a notion of subordination highly focused on the organisational element. Thus, economic actors suffering from the same economic weakness of the employees, but organisationally independent, struggle to obtain the necessary protections. Moving from those remarks the author suggests rethinking the allocation criteria of the labour protections, adopting economic weakness as the main criterion. This category should encompass all the individuals performing a working activity that are not able to significantly influence its financial outcome. The aim of such reform should be to extend the labour protections to all the subjects needing them. The final part of the paper investigates the possible solutions under the current legal framework. The major finding is that under certain circumstances the gig workers can be qualified as temporary employees not of the platform, but of the contractor. In this scenario, the digital platforms should be deemed as job-placement service providers and, thus, they should comply with the relevant provisions. These include the eventual need of administrative authorisations and the free-of-charge principle, whose violations represent, in several jurisdictions, a criminal offence

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